Apparatus for discharging ash from gas producers



Jan. 20, 1953 K. SCHLEPPER 2,626,210

APPARATUS FOR DISCHARGING ASH FROM GAS PRODUCERS Filed Jan. 9, 1950 L Ad INVENTOR BY y? Patented Jan. 20, 1953 APPARATUS FOR DISCHARGING ASHFROM GAS PRODUCERS- Karl Schlepper, Koppern, Germany, assignor toMetallgesellschaft Aktiengesellschaft, Frankfurt-on-the-Main, Germany, a

Germany corporation of Application January 9, 1950, Serial No. 137,662In Germany October 1, 1948 3 Claims.

The invention relates to a process and an apparatus for discharging theresidues of gasification from gas producers operating under a pressureof several atmospheres.

Gas producers operating under pressure of e. 5;. 2-20 atmospheres ormore are generally fitted with special devices for the purpose ofdischarging the residues of gasification. A known device of this kindcomprises a vertical shaft passing through the bottom of the gasproducer and carrying a rotary grate inside of the gas producer. Belowthe rotary grate a scraper arm is attached to the shaft by means ofwhich the residues falling off the rotary grate are moved toward aperiodically operated ash pouch device. With another type of dischargingdevice the rotary grate is provided with a central extension downwardwhich serves as a guide and bearing for the grate and to which thescraper arm is attached. The rotary grate carries a gear Wheel driveactuated by a shaft passing eccentrically through the bottom of the gasproducer. The gasification means is fed to the gas producer through apipe socket centrally located in the bottom of the gas producer. Inother known cases the gasification means is fed to the gas producer fromthe side of a tube for the removal of the residues of gasification isprovided centrally in the bottom of the gas producer.

It is an object of the present invention to provide an apparatus for thedischarging of residues that is simple in construction and reliable inoperation and suitable for gas producers operating under higherpressure, as, for instance, 2 to 30 atmospheres. This aim has beenachieved by providing the apparatus forv discharging the residues with acentrally located hollow shaft through which the residues pass on to theash pouch. The device is actuated in the usual manner by means of ashaft passing eccentrically through the bottom of the gas producer.Inside the gas producer the shaft is fitted with a pinion meshing with agear wheel fastened to the hollow shaft.

The central hollow shaft carries at its upper end two or more scraperarms. These arms scrape the residues of gasification to be dischargedtoward the middle of the gas producer where they drop through the holesprovided in the Wall of the hollow tube into the latter from where theyare conveyed to the ash pouch.

The particular advantages offered by the apparatus according to theinvention consists in the use of a simple driving system and theavoidance of extensive stuffing-box passages. In addition the means forconveyingthe residues of gasi- 2 fication to the ash pouch areconsiderably less complicated than those known so far so that it becomespossible to reduce the height of the gas producer to quite an extent.

The accompanying drawing shows, by way of example, a verticaldiagrammatic section of the apparatus according to the invention: a ithe shell of the gas producer carrying the pressure stresses. The devicefor removing the residues comprises two or more scraper arms b fastenedto the hollow shaft 0 that carries a gear wheel 71.. The hollow shaft cis driven by means of the gear wheel h meshing with the pinion dfastened to shaft e passing through the shell a of the gas producer byway of the stuffing box 2'. The socket k provides a supporting bearingfor the rotating hollow shaft 0.

By means of scraper arms I) the residues of the gasification are movedthrough holes into the hollow shaft from where they pass via the socketk to the ash pouch g through which they leave the gas producer. Thegasification means is fed vi-a Z to the gas producer, which in otherrespects may be constructed in the usual way.

What is claimed is:

1. In a gas producer operating under superatmospheric pressure having ashell and a fuel support provided with a centrally located openingmounted above the bottom of said shell, means for discharging residuesof gasification from such gas producer comprising a centrally locatedupright hollow shaft mounted for rotation on a bearing within the lowerportion of the gas producer shell, said hollow shaft being provided withlateral openings, means for rotating said hollow shaft, at least twoscraper arms mounted above said support on the upper portion of saidrotatable shaft for rotation with said shaft and for urging residues ofgasification toward the opening in the support and the openings in saidshaft for discharge through said openings and said hollow shaft uponrotation of such shaft and an ash pit communicating with the interior ofsaid hollow shaft for receiving the gasification residues dischargedtherethrough.

2. In a gas producer in accordance with claim 1, in which said means forrotating said hollow shaft comprise a gear Wheel mounted on said shaftwithin said gas producer shell, a pinion meshing with said gear wheelwithin said shell and a driving shaft for said pinion passing through astuffing box in said shell.

3. In a gas producer operating under superatmospheric pressure having ashell and a substantially horizontal fuel support provided with acentrally located opening mounted above the bottom of said shell, meansfor discharging residues of gasification from such gas producercomprising a centrally located upright hollow shaft of a smallerdiameter than the opening in said support mounted for rotation on abearing within the lower portion of the gas producer shell, said hollowshaft being provided with lateral openings located below the horizontalplane of said support, inclined means arranged below the opening in saidsupport for guiding gasification residues discharged through saidsupport opening to said openings in said hollow shaft, means forrotating said hollow shaft, at least two scraper arms mounted above saidsupport on the upper portion of said rotatable shaft for urging residuesof gasification toward the opening in the support and the openings insaid shaft for discharge through said openings and said hollow shaftupon rotation of such shaft and an ash pit communicating with theinterior of said hollow shaft for receiving the gasification residuesdischarged therethrough.

KARL SCI-ILEPPER.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 374,453 Corser Dec. 6, 18871,655,320 Lummis Jan. 3, 1928

1. IN A GAS PRODUCER OPERATING UNDER SUPERATMOSPHERIC PRESSURE HAVING ASHELL AND A FUEL SUPPORT PROVIDED WITH A CENTRALLY LOCATED OPENINGMOUNTED ABOVE THE BOTTOM OF SAID SHELL, MEANS FOR DISCHARGING RESIDUESOF GASIFICATION FROM SUCH GAS PRODUCER COMPRISING A CENTRALLY LOCATEDUPRIGHT HOLLOW SHAFT MOUNTED FOR ROTATION ON A BEARING WITHIN THE LOWERPORTION OF THE GAS PRODUCER SHELL, SAID HOLLOW SHAFT BEING PROVIDED WITHLATERAL OPENINGS, MEANS FOR ROTATING SAID HOLLOW SHAFT, AT LEAST TWOSCRAPER ARMS MOUNTED ABOVE SAID SUPPORT ON THE UPPER PORTION OF SAIDROTATABLE SHAFT FOR ROTATION WITH SAID SHAFT AND FOR URGING RESIDUES OFGASIFICATION TOWARD THE OPENING IN THE SUPPORT AND THE OPENINGS IN SAIDSHAFT FOR DISCHARGE THROUGH SAID OPENINGS AND SAID HOLLOW SHAFT UPONROTATION OF SUCH SHAFT AND AN ASH PIT COMMUNICATING WITH THE INTERIOR OFSAID HOLLOW SHAFT FOR RECEIVING THE GASIFICATION RESIDUES DISCHARGEDTHERETHROUGH.